Hi, I wrote a php script to upload docx, doc , pdf file to the server in abc folder and i want that file to be renamed with the name of uploader with uploading date as prefix. When i run it , it shows me error in line 13 and 14.Please help me . Thanks in advance.

PHP Code:
<?php
define
("UPLOAD_DIR""C:\wamp\www\abc\""); ///home/mgcons/my_file_uploads
$name=$_POST["name"];
if(!empty(
$_FILES["uploaded_file"] )){
    
$myFile=$_FILES["uploaded_file"];
    if (
$myFile["error"] !== UPLOAD_ERR_OK){
        echo 
"<p>An error occurred.</p>";
        exit;
        }
        
$day=mktime(date("m"),date("d")+1,date("Y"));
        
$ab=date("d m Y",$day);
        
$bc=$ab.$name;
    
$file_name=preg_replace($myFile["name"],$bc,$myFile["name"]);
    
$success=move_uploaded_file($myFile["tmp_name"],UPLOAD_DIR.$file_name);
    if(!
$success)
    {
        echo 
"Unable to save file.";
        exit;
        }
        
chmod(UPLOAD_DIR $file_name644);
    }
    
$mime="application/pdf; charset=binary"."application/vnd.openxmlformats-officedocument.wordprocessingml.document"."application/vnd.ms-word.document.macroEnabled.12"."application/vnd.openxmlformats-officedocument.wordprocessingml.template"."application/vnd.ms-word.template.macroEnabled.12"."application/msword";
    
exec("file -bi " $_FILES["$myFile"]["tmp_name"], $out);
    if(
$out[0] != $mime){
        echo 
"File is not supported";
        }
        
exec("clamscan --stdout "$_FILES["$myFile"]["tmp_name"], $out$return);
        if (
$return){
            echo 
"This file is infected";
            }
?>